当FOCKE350小盒包装机烟包通道左、右内衬纸边缘检测器在内衬纸检测相位均未检测到内衬纸存在则显示（）故障。
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When using the Call Subflow step, can variables be shared between the parent (calling) flow and the subflow?（）
A. No.
B. Yes.
C. Yes, but they must be manually passed via input and output mapping.
D. Yes, but they must be manually created in both flows and have the same name.&e
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